mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
155 lines
5.4 KiB
C
155 lines
5.4 KiB
C
/* Simulator header for cgen scache support.
|
||
Copyright (C) 1998-2022 Free Software Foundation, Inc.
|
||
Contributed by Cygnus Solutions.
|
||
|
||
This file is part of GDB, the GNU debugger.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#ifndef CGEN_SCACHE_H
|
||
#define CGEN_SCACHE_H
|
||
|
||
/* When caching bb's, instructions are extracted into "chains".
|
||
SCACHE_MAP is a hash table into these chains. */
|
||
|
||
typedef struct {
|
||
IADDR pc;
|
||
SCACHE *sc;
|
||
} SCACHE_MAP;
|
||
|
||
typedef struct cpu_scache {
|
||
/* Simulator cache size. Must be a power of 2.
|
||
This is the number of elements in the `cache' member. */
|
||
unsigned int size;
|
||
#define CPU_SCACHE_SIZE(cpu) ((cpu) -> cgen_cpu.scache.size)
|
||
/* The cache. */
|
||
SCACHE *cache;
|
||
#define CPU_SCACHE_CACHE(cpu) ((cpu) -> cgen_cpu.scache.cache)
|
||
|
||
#if WITH_SCACHE_PBB
|
||
/* Number of hash chains. Must be a power of 2. */
|
||
unsigned int num_hash_chains;
|
||
#define CPU_SCACHE_NUM_HASH_CHAINS(cpu) ((cpu) -> cgen_cpu.scache.num_hash_chains)
|
||
/* Number of entries in each hash chain.
|
||
The hash table is a statically allocated NxM array where
|
||
N = num_hash_chains
|
||
M = num_hash_chain_entries. */
|
||
unsigned int num_hash_chain_entries;
|
||
#define CPU_SCACHE_NUM_HASH_CHAIN_ENTRIES(cpu) ((cpu) -> cgen_cpu.scache.num_hash_chain_entries)
|
||
/* Maximum number of instructions in a chain.
|
||
??? This just let's us set a static size of chain_lengths table.
|
||
In a simulation that handles more than just the cpu, this might also be
|
||
used to keep too many instructions from being executed before checking
|
||
for events (or some such). */
|
||
unsigned int max_chain_length;
|
||
#define CPU_SCACHE_MAX_CHAIN_LENGTH(cpu) ((cpu) -> cgen_cpu.scache.max_chain_length)
|
||
/* Special scache entry for (re)starting bb extraction. */
|
||
SCACHE *pbb_begin;
|
||
#define CPU_SCACHE_PBB_BEGIN(cpu) ((cpu) -> cgen_cpu.scache.pbb_begin)
|
||
/* Hash table into cached chains. */
|
||
SCACHE_MAP *hash_table;
|
||
#define CPU_SCACHE_HASH_TABLE(cpu) ((cpu) -> cgen_cpu.scache.hash_table)
|
||
/* Next free entry in cache. */
|
||
SCACHE *next_free;
|
||
#define CPU_SCACHE_NEXT_FREE(cpu) ((cpu) -> cgen_cpu.scache.next_free)
|
||
|
||
/* Kind of branch being taken.
|
||
Only used by functional semantics, not switch form. */
|
||
SEM_BRANCH_TYPE pbb_br_type;
|
||
#define CPU_PBB_BR_TYPE(cpu) ((cpu) -> cgen_cpu.scache.pbb_br_type)
|
||
/* Target's branch address. */
|
||
IADDR pbb_br_npc;
|
||
#define CPU_PBB_BR_NPC(cpu) ((cpu) -> cgen_cpu.scache.pbb_br_npc)
|
||
#endif /* WITH_SCACHE_PBB */
|
||
|
||
#if WITH_PROFILE_SCACHE_P
|
||
/* Cache hits, misses. */
|
||
unsigned long hits, misses;
|
||
#define CPU_SCACHE_HITS(cpu) ((cpu) -> cgen_cpu.scache.hits)
|
||
#define CPU_SCACHE_MISSES(cpu) ((cpu) -> cgen_cpu.scache.misses)
|
||
|
||
#if WITH_SCACHE_PBB
|
||
/* Chain length counts.
|
||
Each element is a count of the number of chains created with that
|
||
length. */
|
||
unsigned long *chain_lengths;
|
||
#define CPU_SCACHE_CHAIN_LENGTHS(cpu) ((cpu) -> cgen_cpu.scache.chain_lengths)
|
||
/* Number of times cache was flushed due to its being full. */
|
||
unsigned long full_flushes;
|
||
#define CPU_SCACHE_FULL_FLUSHES(cpu) ((cpu) -> cgen_cpu.scache.full_flushes)
|
||
#endif
|
||
#endif
|
||
} CPU_SCACHE;
|
||
|
||
/* Hash a PC value.
|
||
This is split into two parts to help with moving as much of the
|
||
computation out of the main loop. */
|
||
#define CPU_SCACHE_HASH_MASK(cpu) (CPU_SCACHE_SIZE (cpu) - 1)
|
||
#define SCACHE_HASH_PC(pc, mask) \
|
||
((CGEN_MIN_INSN_SIZE == 2 ? ((pc) >> 1) \
|
||
: CGEN_MIN_INSN_SIZE == 4 ? ((pc) >> 2) \
|
||
: (pc)) \
|
||
& (mask))
|
||
|
||
/* Non-zero if cache is in use. */
|
||
#define USING_SCACHE_P(sd) (STATE_SCACHE_SIZE (sd) > 0)
|
||
|
||
/* Lookup a PC value in the scache [compilation only]. */
|
||
extern SCACHE * scache_lookup (SIM_CPU *, IADDR);
|
||
/* Return a pointer to at least N buffers. */
|
||
extern SCACHE *scache_lookup_or_alloc (SIM_CPU *, IADDR, int, SCACHE **);
|
||
/* Flush all cpu's scaches. */
|
||
extern void scache_flush (SIM_DESC);
|
||
/* Flush a cpu's scache. */
|
||
extern void scache_flush_cpu (SIM_CPU *);
|
||
|
||
/* Scache profiling support. */
|
||
|
||
/* Print summary scache usage information. */
|
||
extern void scache_print_profile (SIM_CPU *cpu, int verbose);
|
||
|
||
#if WITH_PROFILE_SCACHE_P
|
||
|
||
#define PROFILE_COUNT_SCACHE_HIT(cpu) \
|
||
do { \
|
||
if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
|
||
++ CPU_SCACHE_HITS (cpu); \
|
||
} while (0)
|
||
#define PROFILE_COUNT_SCACHE_MISS(cpu) \
|
||
do { \
|
||
if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
|
||
++ CPU_SCACHE_MISSES (cpu); \
|
||
} while (0)
|
||
#define PROFILE_COUNT_SCACHE_CHAIN_LENGTH(cpu,length) \
|
||
do { \
|
||
if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
|
||
++ CPU_SCACHE_CHAIN_LENGTHS (cpu) [length]; \
|
||
} while (0)
|
||
#define PROFILE_COUNT_SCACHE_FULL_FLUSH(cpu) \
|
||
do { \
|
||
if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
|
||
++ CPU_SCACHE_FULL_FLUSHES (cpu); \
|
||
} while (0)
|
||
|
||
#else
|
||
|
||
#define PROFILE_COUNT_SCACHE_HIT(cpu)
|
||
#define PROFILE_COUNT_SCACHE_MISS(cpu)
|
||
#define PROFILE_COUNT_SCACHE_CHAIN_LENGTH(cpu,length)
|
||
#define PROFILE_COUNT_SCACHE_FULL_FLUSH(cpu)
|
||
|
||
#endif
|
||
|
||
#endif /* CGEN_SCACHE_H */
|